Brake mechanism for vehicles



R. M. LOVEIJOY BRAKE MECHANISM FDR VEHICLES Filed J7me 9. 1921 5 Sheets-5heet E Inventor.

Rcflph M. Lovejuy yMWA ZWQM flea. 2, 1924. 1,512,7 9

R. M. LOVEJ OY BRAKE MECHANISM FOR VEHICLES Filed June F, 1921 S Sheets-Sheet 2 InvenTor ficliph M. Lovejoy by MWKW Awye R. 'M, LOVEJOY BRAKE MECHANISM FOR VEHICLES 1921 5 Sheets-Sheet Filed June 8 Invemoni Ralph M. Love oy- R. M. LOVEJQY BRAKE MECHANISM FOR VEHICLES Filed Juhe s,

1921 5 Sheets-Sheet 4 VI, W

T WI W U R. M. LOVE JOY BRAKE MECHANISM FOR VEHICLES Filed June 8, 1921 5 Sheets-Sheet 5 I s n a O O lnvenror.

Ralph M. Lovejoy Anya m.....m.,-wm.mw

application filed June 1%,

ting like r his invention relates to improvements in main mechanisms for vchicl and the icipal oh iect oi the invention is to promeans for apply ng brakes which will exert equal .L-rak rig power upon the brakes oit' ccrtain pairs, or preferably all. of the wlicelsoi? the vehicle.

A further object of the invention is to provide braking mechanism for the steering wheels of a. vehicle in which. "equal braking power may he applied to, both steering wl irrespective of the steering position of said wheel.

.ii. further object of the invention is to provide means for applying equal braking force to each of the steering wheels and also to appan equal iii-airing force to the other supporting whee-1s.

J .l llll;l1lfl. Ol'E lQClJO the invention is to pro- 'vidc diiiercntially operated mechanism including frictional means for applying equal in king force to the steering wheels and also ,ially operable mechanism including "'onal incai'is "for supplying equal braknice to the members oi. other pairs of rzurtii'ig wheels with differentially open means, preferably under frictional confor causing equal application of braking :orcc to the steering" wheels and the other supporting wheels of the vehicle.

Ii. further object of the invention is to provide u'ioans for positively and. simultane releasing both luakos of a pair of mi preferably for positively, simulreleasing the lJlfill kS for all the wheels oi the. vehicle.

@ther and :lcaturcs of the inven tion l more fully appear from the :tolloiving description and the anne: 3d draw-- l1l will be pcuted out in the acconr oam ig claims.

The invention is illustrated herein as ap plied to a motor driven vehicle or automohils of the usual type only so much. of the ,rltmlllfiiilltslilll F023, VEHICLE 1921. Serial no. 475,912.

chassis of the vehicle being shown as is required to illustrate the application of the invention thereto.

In the drawings:

Fig. l is a plan. view of the chassis of a vehicle illustrating the improved braking mechanism as applied to the steering and driving wheels;

Fig. 2 a plan view on an enlarged scale, certain portions or the mechanism being broken away, and other portions shown in section. to illustrate the brake applying equalizing and actuating mechanisms; L

Fig. 3 is an elevation, partly in section, of one of the wheel supported side frames of a motor vehicle, showing one section off the supporting frame for the equalizing mechanism removed and illustrating the shafts of the equalizing .mechanism and the front axle in section;

Fig. 4 is an enlarged detail perspective view showing the means for transmitting power through a brake knuckle, the members of the brake knuckle being shown in dotted lines in'a position in which the stcering wheels are turned to one side;

Fig. is a detail view in vertical section oi? one of the brake knuckles, showing the means for transmitting the power therethrough to the hrakii'ig mechanism;

Fig. 6 is a detail View, partly in section, showing the differential gears and one of the frictionally controlled differential pinious which actuate said ears.

The invention in its broad aspect comprises hraking mechanism for vehicles in which the brakes for the steering wheels are actuated through equalizing means which will cause the brakes to operate with equal braking power upon each of the steerinc; wheels. In the preferred embodiment of the invention the equalizing means comprises a pair of equalizer shafts which are actuated through a differential havin a frictionally controlled differential pinion. Preferably the other pair or pairs of wheels of the vehicle are also provided with brakes and each pair is controlled by differentially operable means. actuating Usual motor vehicle constructions com- 4' snail scope of. the invention.

prise two pairs of wheels, :1 pui oif rear driving Wheels and :1 pair of it'ronis steering Wheels. In the present exnbodin'ient of the invention, therefore. means are illustrated ,for equalizing the braking mechanism for the steering Wheels and also the driving Wheels. lit Wili, however, be understood that if u greater number of pairs of wheels are employed e duplication oi: the equalizing mechanism may be providecl- 101* so many pairs as may be (lGSlIECl Within the spirit it will be understood that if instead of 21 PM? of steering wheels, 21 single front steering Wheel is provided, suitable equalizing means embodying the principles oi the inyeniuon herein forth may be incorporated.

lo proviele an equal braking action upon the sieering Wheel and ihe oiher Wheels of the vehieie.

The chassis of she motor vehicle which is illusirsieo herein comprises we usual side frames 1, 52, which are connected by cross girders 3, the frame being supported by suitable springs 4 upon the usual front and rear ixlesfi, 6. The vehicle may be driven by any type of roo'cor, such as an internal combustion engine 7, which operatesthrough a driving shaft 8 and the usual type of differential contained in a casing 9 forn'iing part of the rear axle &0 drive the rear Wheels of the ehicle. it will be understood, llOnever, that ilie present invention may be up plied {no a Vehicle in which all of (he wheels are power driven.

As illustrates herein the front Wheels are respectively provided with brake drums 19,

Ill. and the rear Wheels with brake drums l 12%, said brake drums being preferably enclosed in casings of the usual type.

Any suitable form of expanding or con enacting broke mechanism may be employed. Preferably, however, the brakes ure of the type illustrated and described in Potent No.

. 1,363,607, granted December 28, 1920, which disolose brskin mechanism in which means are provided for expanding a pair of dia- .metrioelly oppositely (lisposocl brake shoes against the drum with equal braking force .anci else illustrates mechanism for insuring simultaneous release oi all parts of ixhe brulie shoes from engagement with the drum. In

Furthermore, v

riecl by :1 short shu'l't 35 journullerl in will be readily LHMlEBT'fOUL'l without; the new siiy of detail illuss'retion oi other r' ypes of brakes.

The most difficult problem in providing means for broking the steering Wheels of :1 vehicle erises from the not that the steer-- lug wheels lllllSii be moved about u pivotal ends to various steering positions.

in Lbs present invention disks are cured rigidly iio the front: axle s dies 15 Whieh ere pivotslly mounted in the usual steering linuolc Us 10 at the ends of the axle 5. To such of the disks lei o, housing 17 is secured, by bolls or other suitable fasten ing which is provided with journals for u broke o 'iplyiug rock shaft 18 having un :irin iii through wl 'eh the brake :locs are forced iiomird unel sway from the blillili drum, The housing; Ii? is provided with u tubular (h'iwnwui'd ex ension 29 upon which :1 lower box-like housing r casing 21 is roiul'ubly mounted. The lower end of the tubular 0X- tension :20 is provided with a screw thrczuleil supporiing member 22 which uni'lerlies, engages and supports the housing 211. The housings 17 and 521 are formed in $ouliom3 us ill stru seil in ()lillfl that, they niuy be easily assembled.

The reel: shalt i8 is provided with a gear segment which engages teeth 2-] in The flattened of u cylindrical rack bar 25 which sliilubly join-nailed in :1 suitable bearing concentric, with the tubular onionsion is). The lower end of the rack bar is provided with u series of annular teeth 526 which are engugefi by s, gear Moment 9/? leol by u horizontal-,1 trans-nutter shul't' which is jouruulled. in suitable hearings in an extension 29 of iihe lower housin l.

' The outer end of the housing 29 is Pl'OlltlOLl with an enlarged, preferably hemispherical, flanged extension 30 :nulis .corored by u suiizuble lu-inispliericul esp 31 having flanges eorrespoiuiing to those of suitl extension and ualupteclio be secured lhei'eio by suitable bolts 32 The shaft 28 is provided at its outer eiul ui 1 u berclml gear 38 which on guges u oouiplemenssry beveled geur Ell euru been ing in the extension 30 and sup Ell. The shaft 353 is connected by u. universal or ninebsl joint 2-36 to u longiliiuiinully eiuieiuiing transmitter" shaft 3?, the opposifo end. of which is connected by u gimbul joint 38 to :1 short: shift 39 which mounted in on equalizer frame and is provided with a beveled gear l0 which operuied by one of the equalizer shafts.

The equalizer lirun'io eon'ly' fises u oontrul body portion formalin two 3 ions 4-1 und 42 buying suitable flui'iges by means of which the some may be secured together, suicl sections being provided with lsierully extending tubular :irins end 44- \YlllCll are secured at their ends to the side bars 1 and ill! low

of the frame. The body portion of the tial pinions 58 fricliouall engage surfaces equalizer tranie desirably extentls .lengtlr til upon the outer face of the disk 30.. wise oi' the central portion of the chassis and iliil'erential pinions are turned against ie has at its rear end. similar tubular extensions frictional surfaces (it. by springs 65 interlo and all; which also are anchored at their posed hetween the .01 face the emls to the side bars 1. and 2 of the frame. (litlerential pinions and the z or Thus the equalizer frame is rigiolly supporttllfi stud she so that the rotation 01 the ed and its hollow body also provides an oil pinion will be prevented unless greater chamber. resistance imposed to the rot; tion of one A pair oi collinear equalizer shafts 4.7 are oi. the gears 57 or ill than to the other.

'inountecl in suitable hearings in the tubular The shaft 56 of the master tlill erential. is extensions 43 and. 44: of the equalizer frames provided with an arm 6'2 which is connected and at their outer ends are provided. with hy a link 68 to a manually operable lever gears 48 which engage the gears Q0 of the which is pivotally mounted upon shalt "ll longitudinal transmitter shafts. The colextending transversely of the frame. "lilo linear equalizer shafts are provided at their lever 59 desirably provided with a pedal inner or adjacentencls with differential gears 71. 49 which are engaged anal driven lay clilier- Preterahly means are provicleel for autoential pinions 50 which are mounted upon inatically taking up any wear which. may preferably diametrically oppositely ar occur in the train of the: iii-airing mechanism.

ranged stud shafts 51' in a two-part casing A preferred construction which cliagraln- 52 which is provided with hearings rotatmatically illustrated asa casing ?2 in Fig. ably m unted upon the equalizer shafts 457. 3 in the present application is fully disclosed. Friction CllSliS 53, which are secured. against in my pending application 0. 43,006 filed. rotation upon the stud shafts 51, are pressed February 7, 19:21. In that construction the against the outer faces of the differential link which connects the oralre lever 68 to the pinions by helical springs surrounoling brake actuating mechanisms is formed in said stucl shafts 51 and serve to prevent the sections and a supplemental lever is providpinions from rotation about their axes until ed which is operable automatically, when the sufiicient rotative force is applied. to overbrake lever is aclvancezl beyond a. predeterdriven by a gear which is 'rotatah come the friction between the disks 53 and mined distance. to increase the braking acllle outer faces of the differential pinions. tion and also to shorqen the etiiective length Any suitable means may be provioleil for of the connecting; linkage 68.

rotating the olitlerential casing 52 to actuate As before stated, the equalizing means till the ditlerential shafts 47. As illustrated may he provided toapply power equally herein one side of the casing comprises a upon the hralres tor the rear wheels, or such gear 54 which may be rotated by the brake other supporting wheels as may he provided. lever in any suitable manner. As illustrated In the construction illustrated herein the herein. the gear 54? is actuated through anrear 62 engages a .Jear 73 whicu is securerl as other or master clili'erential which also con to a (lill orential casing; 74- whieh is Oi'illlflllll' tools the rotation of equalizer shafts for the mounted. upon collinear equalizer Slll' 'i'Fl brakes of the rear Wheels. extending axially through the extensions W l i' l n the present illustrative embodiment:- of one 4-6 of the equalizer frame. llitlcrentia the invention the gear 54: engages ancl. is gearing. preferably iaentieal with. that containetl. in the equalizer casing 9 ahove 'fle mounted upon a shaft 56 of a master iliften scrihecl, is proviiled for aetuatangr the ential. ii. heveled gear 5'? which is also roll'crmu'ial eon; izer shafts Yo. o upon the shaft 56 desirably is rigidly 1" "ll? are leil a ti:

(l u; the gear and is actuated with hovers/ti years it; which 911 .1. 50 through diilerential ninions 58 which are 77 car :(l l v shortshafts li'lOtlIiiG lievelrxl it which an on stuil shafts 59 carried by a i are mounted. in suitable hearin s in enlarowl disk which is rigidly secured to tlieinasportions 79 o t the li-iterall extending; nienitor ilillereiu'ial shaft 56. hers ii; ancl 46 oi" the equalizer llullli. The

'lhe ilitl'er-ential pinions 58 also engage a shat'ts 78 are. connected in: universal or .o iin- 55 lieveleil gear tl which is rigidly secured to hal ioii'itu 80 to longit (linall rearuardlyon the lace of a gear tl'r'l which is also rolatahl tiunl'iugr trausn'iiiater shafts 5%! which are con lllfllllllttl ahouz'; the axis oi the shaft '56. The nectei'l at. their rear eruls liy universal 'iointe near 62 in turn en I a suitable gear for 852 to short shalts 83 wh ch are iournulied in actualinn the (litlereu :il which in turn coua casing; or hollow lin'acli'ct whicl'i is trols the rotation at collinear equalizer mounted upon a dish; 35 which is rigidly elm shal'ts for the rear wheel ln'akes as will herccuretl to the rear til-5.9. inatter he more tullv described. The casing or bracket l lcontains a translhe studslnz'lt 53') preferably is anchored verso hralre actuating shaft providocl at one in the clisl; (it) a screw threaded conneoend with a beveled goal; which is driven by a (35 tion 63 ancl. the .---.r tunes of the differen beveled. gear upon the shaft 83 and at its on posits end is provided with an arm which actuates the brake shoes in a mannersimilar to that above described. in reference to the front Wheel steering mechanism.

Preferably a slip joint 1s provirletlin the unirgersal connection to permit relative longitudinal movement or" the casino; 8% and longitudinal transmitter shaft 81 in ortl'er to compensate for the movement of the parts during the vertical reciprocation Clue to'the yielding of the rear vehicle springs when the rear wheels pass over obstructions or clepres sions in the road.

In the operation of the device the application of bra-king force to thepeclal 71 of the brake lever causes the shaft 56 of the runster clifi'erential to be rotated in. a forward direction. This rotation of the shaft causes the rotation of the dish (30 and the diliereutial pinions about the axis of the shaft- The dilierential 'pinions 58 -nihich normally held by friction from rotation in turn rotate the beveled. gears and Glsirnultaneously and consequently rotate thei'llarger gears 55 and 62 squall unless resistance is encounteneilL y one of these gears than the other, in which; event the tliiierential pinions will rotate suihciently about their uses to cause equal braking power to he plied to both of the gears 55 and 62.. the gear (52 which engages the gear 73 upon the rear clilierential casing rotates the latter and through the differential mechanism eontainecl therein transmits equal rotative hralre applying power; to the collinear equalizer shafts 75 which in turn transmits power through the rearwarclly extending t1).DSIl'lliltcr shafts 81 to the shafts ivhich apply the brakes to the rear axle.

At the same time the power which i no through the gear 54. and rotates the forward differential casing 52 about the axes of the collinear equalizer shafts 427 and. through the differential pinlons which, like the pin-- ions 58, are normally hehi by "friction .un rotation, transmits an equal amount of he nor to each of the equalizer shafts il 'f If great-- er resistance is encountered by one of the equalizer shafts than the other, the tlih erential pinions rotate about their ares unoler the aforesaid frictional control so that one of these shafts is rotated until the power ap plied through it is equal to that applied through the other. The power applied through the equalizer shafts is transmitted through the forwardly extending transmitter shafts 37 to the transverse shafts 28 cans ing the rotation of the latter which operate the sectors 27. Each sector engages the an nular teeth of the Vertically extending rack bar 25 and reciprocates the same vertically in the line of the axis of the tubular menr ber 20 which pivotally connects the casings 21 and 17. The tootheci upyer end. of the when the steering may he applied either to the st or are. ll he noted that by reason oi the. tact that the r l retoroeates in the vertipiwital connection between the l. and the upper c 3on9; shalt 18 his power .ap 3e applied Wlmels are in. any steering position.

Fur-tin I till he observed that since the lower cos 1;; 21 is sn jiportc il lwthe upper casing 11 irouu'h the tubular e nsion 5 35), the lower casing; .21 is free to more both pivotally and. laterally so that with the universal connection 36 which connects he ioniai't with the sham. n'ee movement is permitted which will enable the steering Wheels to he r'zliil y ertcntlino; transmitter moved about the ver ical axes oi the steering posts without inte :ering in any manner ith the actuation oi the braking machauisnz.

Any us al means may he provided for witlnira'wing the hrelce lever 65) when pressure n the pedal 71 is rele sealv Jlrs illustrates oerein a spring 85 is con; ""tl to the hralrs h versel h COHSUUQL '58 anal to a t Q.Tl3Gi](ll no; trans "can the or bars ill :iml

I, as soon as th he is released Tie his} a the actrion oi u s and can posits riirection. reason or the eontrol of the pinions and 58 the equalize ing' mechanism is equally oi'lzctiv in its equalizing action upon hash? o, nmreinrnt positive v to release siniultancously he opiriction all of the hralze shoes from cogs their respective hr hile hal :.or a} ancl equal.

ill sa .1 the hralres simully to all our WllQOlS of it ill he mulerstoml that the vehe novirlerl with hut a single pair anu that the braking or taneousl vehicle, hicle may oi hrahes or to the driving Wheels or lllilt/ ulcrmnl ent means may he provided for actuating: the brakes for the steering wheels from that which is utilized for operating the hr: lZGS of the driving; Wheels. 7 I

It will also he understood that if a gljrealer niunher oi. pairs of 'WlVPOlS is pro "loll suitable n'mltiplication of collinear equalizer shafts anti (liliercntial means of the charactcr (flescrihccl for operating each of: the shafts and for ccanrrlinaiing the operation of all of the equalizers may he prorirleil within the spirit and scope of the invention.

It is further to he uiul 3 t l that (he rm ticular erirhorlinie ot the invention ilio" closed herein of an illu trativc araclcr lUii and is not restrictive and thatany mecha nism for accomplishing the purposes disclosed herein may be employed Within the meaning and scope of the following claims.

liluving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. A. vehicle having a plurality of Wheels including a pair of steering wbeels a brake for each of said steering Wheels, means for simultaneously actuating said brakes including equalizing means operating to cause equal application or said brakes'and also acting positively to release said brakes com pletely and substantially simultaneously.

2. A vehicle having a plurality of Wheels including a pair of steering Wheels each of Which is movable about a vertical pivotal axis, a brake for each of said steering Wheels, means for simultaneously actuating said brakes including equalizing means operating to cause equal application of said brakes and also acting positively to release said brakes completely and substantially simultaneously. i

3. A vehicle having a plurality o'l wheels including a pair of steering Wheels each of which is provided with a brake drum, a non rotatable brake in (ac-operative relation to each brake drum, means for simultaneously actuating said brakes including equalizing means operating to cause equal application of said brakes to said drums and also actingpositivcly to cause complete and substantial. simultaneous release or" said brakes from said drums,

4:. A vehicle having; a pair of steering Wheels each of which is pivotally mounted to swing about an independent vertical axis,

a pair of brakes for each of said, steering Wheels, a pair of rotatable equalizer shafts, means operable respectively by said shafts to apply said brakes and differentially operable means acting upon said equalizer shafts to apply said brakes with equal iorce and also acting positively to release said nairs oi brakes completely and substantially simultaneously.

5. A vehicle having" a plurality of pairs of Wheels, a brake for each Wheel, a plu ality of rotatable equalizer shafts each operable to apply brakes to the respective. Wheels, dil ferentially operable means for actuating said equalizer shafts and means for equalizint, the action of said equalizer means.

6. A vehicle couu'lrising av frame. a pair of steering; wheels each of which is pivotally mounted to swing: about an independent vertical axis, a brake 'l'or ouch steering Wheel and brake actuating m ans including; p 'nvcr transmitlilu! ulcmbcrs z p votall v mm ablc re spcctivcly about axes parallel with the vertical axes of said steering Wheels.

7. A. vehicle comprising a frame. a pair of steering Wheels each oi? which is plvotally wheels including steering Wheels mounted to swing about an independent vertical axis, a brake each. wheel, brake actuating means including power transmitting members pivotally movable respectively about axes parallel with the verti cal arcs of. said steering Wheels and re ciproceble means movable in the direction Of the lines of the pivotal oi said power trz-insinitting members.

8. A vehicle having a plurality of pairs 0t Wheels including ste ring Wheels each of Wl1lCll is provided with a brake d n-um, non rotatable dislzs (3t crying brakes copperating with the respective brake drums, a brake knuckle czurriedby each disk comprising a casing fixedly secured to said disk and a casing pivotally iuolintcd'upon said fixed casing brake applying shafts mounted in said fixed casings, power transmitting means mounted in said pivotally mounted casing, means torsimultaneously actuating said transmitting means and means for operating saidbl'plte' applying shalt from. said transinittinlg; means.

9. A vehile having a plurality ct pairs ct each of which isyprovi led with brake drum, nonrotatabledisks carrying brakes cooperating with the respective brake drums, a brake knuckle carried by each disk comprising a casing fixedly secured to said (lick and a casing pivotally mounted upon. said lined cas ing, brake applying shafts mounted in said lined casings, power transmitting shalt-s mounted in said pivotally mounte srig,

means for simultaneously actuating said transmitting shafts, and members reciprocable in the direction. of the axes of the. pivotal connections of said casings acting to trans mit rotation from said transmitting shalls to saidv brake applying shafts.

l0. A vehicle having a plurality o'f'pairs ot' Wheels including steering Wheels each or which is provided with a b alto drum, nourotatable disks carrying brakes co-opcratiug with the respective brake drums, a brake knuckle carried by each disk comprising a casing fixedly secured to said disk and a casing pivotally mounted upon said lined casing, brake applying sbults mounted in said fixed casing-s, po iver truusn'iitl ing shaft-s mounted in said pir otally mounted casing, means for simultaneously actuatin said transmitting shafts, gears on said brzilte plying; shafts and on said transmitting shafts and racks rcciprocable in. the direction ot the axes of the pivotal conuectionsot said casings acting to transmit rotation from said trauruulltiug shafts to said brake applying slur ll 5:.

ll. A vehicle having: a plurality of pairs cl Wheels includiur, steering Wheels each of whichjs provided with a lu'ak c drum, nonrotatublc disks carrying brakes cooperating with the respective brake drums, a brake 'ing each knuckle carried by each (lislc comprising a casing fixedly seeurecl to saicl clislr and casing pivotally mounted upon saitl fixecl casing, brake applying shafts mounted in sairl fixetl casings, power transmitting; shafts mounted in said pivotally mounted casing, means for simultaneously actuating said transmitting shafts, gears on saicl brake applying shafts and, on said transmitting shafts, racks reciprocahle in the direction of the axes of the pivotal connections of saicl casings having plain teeth engaging the gears of said brake applying shafts and annular teeth engaging the gears of said transmitting shafts actingto transmit motion from saitl transmitting shafts to saitl brake applying shafts.

12. A vehicle having a plurality of pairs of Wheels including" steering Wheels, a brake for each steei'i.ng Wheel, brake applying means including collinear equalizer sha'fls having (lillerential gears upon their adjacent ends, lillerential pinions engaging said differential gears, means for imparting a planetary movement to sai l clillercntial pin ions about the axes of saicl equalizer shalt-s and means governing the rotation of said. lifi'erential pinions operating'to cause equal explication of said hralcesnncl acting" shnul- ,taneously to release said brakes.

'13. A vehicle having a plurality of pairs of wheels iiicluding steering wheels, brake for. each steering Wheel, brake applying means including collinearequalizer ahas having (lifierential gears upon their ad acenla encls, a dill'erential casing rotatable about the axes of saicl equalizer shafts and. means for actuating the same, (liilereutial pinions engaging said (lillerential gears mounted upon shafts in saitl difierential casings and spring actualecl frictioual means governing the rotation of said differential pinions.

14:. A vehicle having a plurality of pairs of wheels including a pair of steering wheels, a lorake drum carried. by each of said steering wheels, non-rotatable brakes co-0perating with said drums, HZIlIQ applying shafts and means for actuating the same inclucli T" Li) collinear equalizer shai'ts antl means for transmittin power from saul equalizer shafts to salcl brace applying shale includ' in trains of gears for said equalizer shafts will said brake applying shafts and longitudinal transmitting shafts having universal connections to said trains ofgears.

15. A vehicle having a plurality oi: pairs of wheels, a brake and brake applying means for each Wheel, pairs of equalizer shafts, means operable by each 'palr of equalizer shafts to actuate the brake applying means for a pair-of wheels, a dillerential connectfor simu Fair of equalizer shafts and means taneously actuating said chfi'erentials selectively to cause the application or release of said Makes.

16. A vehicle having a pluralitr of pairs of wheels, a brake and brake applying; means for each Wl'ieel, pairs of equalizer slia'l'l's, means operable loy each pair of equalizer shafts to actuate the brake implying meansit'or a pair of Wheels, a diilereulial connect.- ing each pair of equalizer shafts, a master differential actuating all said equalizer (li1' ferentials and means for operating said master clill'erential.

17. A vehicle having: a plurality of pairs of Wheels, a bral-ie and brake applying means for each Wheel, pairs of equalizer shalls, means operable by each pair of equalizer shafts to actuate the brake a iplyiugr means for pair of wheels, a tlill'ereui'iial connecting each pair of equalizer shafts, a master (lillerential for actuating all of said equal-- izcr differentials comprising); ilillcrculial gears ancl a clisl: arryiug (lill'crcnlial pinious meshing with said n'iastcr (lillerculial gears. frictional ineans governing the rotation cl" said pinions and means for rotating said clislu 18. A vehicle having a pluralioy of pairs of Wheels, a brake and brake applying means for each Wheel, pairs oi equalizer shafts, means operable by each pair of equalizer shafts to actuate the brake apply ing means for a pair of wheels, a lillcrcutial connecting each pair of cqualiaer aha its. a master differential actuating all said equalizer (lill'erentials czunprisin g (lillcrential gears enga ing gears of the ccpializcr clillercntials, a clisl: having on its periphery stud shafts carrying (lili' :ential pinions engaging the master rlill ercutial gears and springs mounted on saicl SlJJll'SlHil l-S acting to force said difi'erential piuions into friclional engagement with said disks thereby to govern the rotation of sai l master differential pinions and means 'lor actuating said disk.

19. A vehicle having a frame, a plurality of airs of Wheels, brakes and brake applying i'neans for each wheel. an equalizer frame comprising a hotly pmlion forming an oil chamber and tubular cxtcnsiom' anchored at their encls to the 'l'ramc of lhe vehicle, pairs of collinear equalizcr sha'l't's mounted in said tubular oxlensions, mcaus operable by each pair of equalizer shafts to actuate the brakeapplying means for a pair of wheels, a (lillfcrcntial connecting each pair of equalizer shafts, a master (lill'crcntial for operating said equalizer (lillcrcutials ancl lllmlllS for actuating said master difierential.

In testimony whereof, I have signed my name to this specification.

nah-PH M. LGVEJ'OY. 

